How do I handle taxes and duties for my dropshipping store?

Hi, I’m just on the edge to start a Shopify dropshipping store, Store created and almost 50% settings have been done. During the settings, I found the “Taxes & Duties” tab. I wanted to know that, I’m starting my store from Pakistan and will list products from various sources. Kindly elaborate that it is only up to me to collect taxes and duties from the buyer or it is up to third parties.? Or Shopify to manage all these things?? On a serious note, I have zero % knowledge of such things. I just want to start my store and try to avoid such things as axes. It is possible that taxes and duties can manage by Shopify and third parties?